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# CUET Physics Questions Dual Nature of Radiation and Matter

Hi CUET aspirants, Welcome to Amans Maths Blogs (AMBIPi). In this post, you will get CUET Physics Mock Test Dual Nature of Radiation and Matter AMBIPi. This CUET Physics Mock Test is of the Physics chapter Dual Nature of Radiation and Matter. Before solving these CUET Physics questions, you must read CUET Physics Notes, which helps you to revise and then you must need to solve CUET Previous Years Questions Papers.

## CUET Physics Mock Test

CUET Physics Question No: 1

The momentum of a photon is 3.3 × 10–29 Kg–m/s. Its frequency will be

Option A : 3 × 103 Hz

Option B : 6 × 103 Hz

Option C : 7.5 × 1012 Hz

Option D : 1.5 × 1013 Hz

Option D: 1.5 × 1013 Hz

p = hv/c

⇒ v = pc/ h = 3.3 x 10-29 x 3 x 10 8 / 6.6 x 1034

= 1.5 x 1013 Hz

CUET Exam Physics Question No: 2

The momentum of a photon is 2 × 10–16 gm–cm/ sec. Its energy is

Option A : 0.61 × 10–26 erg

Option B : 2.0 × 10–26 erg

Option C : 6 × 10–6 erg

Option D : 6 × 10–8 erg

Option C: 6 × 10–6 erg

p = E/c ⇒ E = p x c = 2x 10 – 16 x ( 3 x 1010)

= 6x 10-6 erg

CUET UG Physics Question No: 3

The momentum of the photon of wavelength 5000 Å will be

Option A : 1.3 × 10–27 Kg-m/s

Option B : 1.3 × 10–28 Kg-m/s

Option C : 4 × 1029 Kg-m/s

Option D : 4 × 10–18 Kg-m/s

Option A: 1.3 × 10–27 Kg-m/s

p = h/ λ = 6.6 x 10-34 / (5000 x 10-10 ) = 1.3 x 10-27 Kg-m/s

CUET Domain Subject Physics Question No: 4

The momentum of a photon of energy h will be

Option A : hv

Option B : hv/c

Option C : hvc

Option D : h/v

Option B: hv/c

P = e/c = hv /c

CUET BSc Physics Question No: 5

A photon in motion has a mass

Option A : c/hv

Option B : h/v

Option C : hv

Option D : hv/c2

Option D: hv/c2

E = hv = mc2  m = hv/ c2

CUET Entrance Exam Physics Question No: 6

The energy of a photon is E = h and the momentum of photon p= h/λ, then the velocity of photon will be

Option A : E/P

Option B : EP

Option C : (E/P)2

Option D : 3X108 m/s

Option A: E/P

Momentum of photon c = E/P

⇒ velocity of photon c = E/P

CUET Exam Question No: 7

An important spectral emission line has a wavelength of 21 cm. The corresponding photon energy is

Option A : 5.9 ×10–4 eV

Option B : 5.9 ×10–6 eV

Option C : 5.9 ×10–8 eV

Option D : 11.8 ×10–6 eV

Option B: 5.9 ×10–6 eV

E = hc/ λ = 3x 108 x 6.62 x 10-34 / 0.21 x 1.6 x 10-19 = 5.9 x 10-6 eV

CUET Physics Practice Questions No: 8

The energy of a photon of light of wavelength 450 nm is

Option A : 4.4 ×10–19 J

Option B : 2.5 ×10–19

Option C :1.25 ×10–17

Option D : 2.5 ×10–17 J

Option A: 4.4 ×10–19 J

E = hc/ λ

= 6.62 x 10-34 x 3 x 108 / 450 x 10-9 = 4.4 x 10-19 J

CUET Physics Sample Paper Question No: 9

If a photon has velocity c and frequency , then which of following represents its wavelength?

Option A : hc/E

Option B : Hv/c

Option C : hv/c2

Option D : hv

Option A: hc/E

E = hc/ λ = λ = hc/ E

CUET Physics Mock Test Question No: 10

Einstein’s photoelectric equation states that EK = hv–∅ . In this equation EK refers to

Option A : Kinetic energy of all the emitted electrons

Option B : Mean kinetic energy of the emitted electrons

Option C : Maximum kinetic energy of the emitted electrons

Option D : Minimum kinetic energy of the emitted electrons

Option C: Maximum kinetic energy of the emitted electrons

According to Einstein’s photoelectric equation, EK refers to maximum kinetic energy of the emitted electrons.

CUET Physics Question No: 11

As the intensity of incident light increases

Option A : Photoelectric current increases

Option B : Photoelectric current decreases

Option C : Kinetic energy of emitted photoelectrons increases

Option D : Kinetic energy of emitted photoelectrons decreases

Option A: Photoelectric current increases

Intensity increases means more photons of same energy will emit more electrons of same energy, hence, only photoelectric current increases.

CUET Exam Physics Question No: 12

The photoelectric effect can be understand on the basis of

Option A : The principle of superposition

Option B : The electromagnetic theory of light

Option C : The special theory of relativity

Option D : Line spectrum of the atom

Option D: Line spectrum of the atom

Photoelectric effect can be explained on the basis of spectrum of an atom.

CUET UG Physics Question No: 13

The minimum wavelength of photon is 5000 Å, its energy will be

Option A : 2.5 eV

Option B : 50V

Option C : 5.48 eV

Option D : 7.48 eV

Option A: 2.5 eV

E = 12375/ λ = 12375/ 5000 = 2.47 Ev = 2.5eV

CUET Domain Subject Physics Question No: 14

In photoelectric effect, the electrons are rejected from metals if the incident light has certain minimum

Option A : Wavelength

Option B : Frequency

Option C : Amplitude

Option D : Angle of incidence

Option B: Frequency

In photoelectric effect for a given photosensitive material, there exists a certain minimum cut-off frequency, called the threshold frequency, below which no emission of photoelectrons takes place no matter how intense the light is.

CUET BSc Physics Question No: 15

The idea of matter waves was given by

Option A : Davisson and Germer

Option B : de-Broglie

Option C : Einstein

Option D : Planck

Option B: de-Broglie

The idea of matter waves was gives by deBroglie.

CUET Entrance Exam Physics Question No: 16

Wave is associated with matter

Option A : When it is stationary

Option B : When it is in motion with the velocity of light only

Option C : When it is in motion with any velocity

Option D : None of these

Option C: When it is in motion with any velocity

According to de-Broglie hypothesis, wave is associated with matter when it is in motion with any velocity.

CUET Exam Question No: 17

The de-Broglie wavelength associated with the particle of mass m moving with velocity v is

Option A : h/mv

Option B : mv/h

Option C : mh/v

Option D : m/hv

Option A: h/mv

λ = h/P = h/mv

CUET Physics Practice Questions No: 18

A photon, an electron and a uranium nucleus all have the same wavelength. The one with the most energy

Option A : is the photon

Option B : is the electron

Option C : is the uranium nucleus

Option D : depends upon the wavelength and properties of the particle.

Option A: is the photon

λ = h/P = h/ mv = h/ 2me

CUET Physics Sample Paper Question No: 19

A particle which has zero rest mass and non-zero energy and momentum, must travel with a speed

Option A : Equal to c, the speed of light in vacuum

Option B : Greater than c

Option C : Less than c

Option D : Tending to infinity

Option A: Equal to c, the speed of light in vacuum

Particle is photon and it travels with the velocity equal to light in vacuum.

CUET Physics Mock Test Question No: 20

Particle nature and wave nature of electromagnetic waves and electrons can be shown by

Option A : Electron has small, deflected by the metal sheet

Option B : Ex-ray is diffracted, reflected by thick metal sheet

Option C : Light is refracted and defracted

Option D : Photoelectricity and electron microscopy